Rust bindings for vboot_reference

This path contains the vboot_reference-sys crate which uses bindgen to generate Rust bindings for the vboot_reference C library.

Each header is included as its own submodule. To use these bindings:

• Add vboot_reference-sys to your Cargo.toml for example:

[dependencies]
vboot_reference-sys = { path = "../../vboot_reference/rust/vboot_reference-sys" }

• Include the symbols you need for example:

use vboot_reference_sys::crossystem::*;

The build.rs in vboot_reference-sys takes care of adding the necessary includes and linker flags for vboot_host through the pkg-config crate.